使用打开 XML 更改 excel 文件的 Sheet 选项卡颜色

Question

我想更改 excel Xlsx 文档的 sheet 选项卡颜色。我正在使用以下代码，但它没有设置 sheet 颜色。当我设置 sheet 选项卡颜色时出现对象引用异常。

public static string filepath = @"C:\Test\Book1.xlsx";
private static void ChangeSheetcolor()
{
    try
    {
        using (SpreadsheetDocument spreadSheetDocument = SpreadsheetDocument.Open(filepath, false))
        {
            WorkbookPart workbookPart = spreadSheetDocument.WorkbookPart;
            IEnumerable<Sheet> sheets = spreadSheetDocument.WorkbookPart.Workbook.GetFirstChild<Sheets>().Elements<Sheet>();
            //my code
            WorksheetPart worksheetPart =
                  GetWorksheetPartByName(spreadSheetDocument, "Sheet1");

            if (worksheetPart != null)
            {
             //   worksheetPart.Worksheet.SheetProperties.TabColor.Rgb = DocumentFormat.OpenXml.HexBinaryValue.FromString("Red");
                worksheetPart.Worksheet.SheetProperties.TabColor.Rgb = DocumentFormat.OpenXml.HexBinaryValue.FromString("#CCCCCC");
                // Save the worksheet.
                worksheetPart.Worksheet.Save();
            }
        }
    }
    catch (Exception ex)
    { 

    }            
}
private static WorksheetPart
     GetWorksheetPartByName(SpreadsheetDocument document,
     string sheetName)
{
    IEnumerable<Sheet> sheets =
       document.WorkbookPart.Workbook.GetFirstChild<Sheets>().
       Elements<Sheet>().Where(s => s.Name == sheetName);
    if (sheets.Count() == 0)
    {
        //does not exist
        return null;
    }
    string relationshipId = sheets.First().Id.Value;
    WorksheetPart worksheetPart = (WorksheetPart)
         document.WorkbookPart.GetPartById(relationshipId);
    return worksheetPart;
}

如何使用 Open XML dll 更改 sheet 选项卡颜色？

Answer 1

据我所知，您似乎有 3 个问题。首先，您调用的 Open 方法的第二个参数表示文件是否可编辑。如果你想编辑文件，你需要在这里传递 true 否则你会在保存工作表时遇到以下异常：

System.IO.IOException: Cannot get stream with FileMode.Create, FileMode.CreateNew, FileMode.Truncate, FileMode.Append when access is FileAccess.Read.

其次，SheetProperties 或 TabColor 可能为空。在 XSD 中，它们被定义为

<xsd:element name="sheetPr" type="CT_SheetPr" minOccurs="0" maxOccurs="1"/>

和

<xsd:element name="tabColor" type="CT_Color" minOccurs="0" maxOccurs="1"/>

请注意，两者都有 minOccurs="0"，因此两者都可以为空。如果是，您只需创建新实例并将它们分配给 Worksheet.

最后，Rgb 属性可以说是错误地命名为 documentation 州（强调我的）：

Standard Alpha Red Green Blue color value (ARGB).
The possible values for this attribute are defined by the ST_UnsignedIntHex simple type (§18.18.86).

18.18.86 继续说（再次强调我的）：

This simple type's contents have a length of exactly 8 hexadecimal digit(s).

假设您想要纯色，您可以将 Alpha 通道设置为 FF。您也不应该包含前导 #，因此对于纯红色，例如您应该使用 "FFFF0000"。有关 ARGB 值的更多详细信息，请参见 this question。

把所有这些放在一起你的代码变成这样：

public static string filepath = @"C:\Test\Book1.xlsx";
private static void ChangeSheetcolor()
{
    try
    {
        using (SpreadsheetDocument spreadSheetDocument = SpreadsheetDocument.Open(filepath, false))
        {
            WorkbookPart workbookPart = spreadSheetDocument.WorkbookPart;
            IEnumerable<Sheet> sheets = spreadSheetDocument.WorkbookPart.Workbook.GetFirstChild<Sheets>().Elements<Sheet>();
            //my code
            WorksheetPart worksheetPart =
                    GetWorksheetPartByName(spreadSheetDocument, "Sheet1");

            if (worksheetPart != null)
            {
                //create the SheetProperties if it doesn't exist
                if (worksheetPart.Worksheet.SheetProperties == null)
                    worksheetPart.Worksheet.SheetProperties = new SheetProperties();
                //create the TabColor if it doesn't exist
                if (worksheetPart.Worksheet.SheetProperties.TabColor == null)
                    worksheetPart.Worksheet.SheetProperties.TabColor = new TabColor();
                //this will set the tab color to Red
                //note the value is an ARGB not an RGB
                worksheetPart.Worksheet.SheetProperties.TabColor.Rgb = DocumentFormat.OpenXml.HexBinaryValue.FromString("FFFF0000");
                // Save the worksheet.
                worksheetPart.Worksheet.Save();
            }
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine(ex.ToString());
    }
}

使用打开 XML 更改 excel 文件的 Sheet 选项卡颜色

Change Sheet tab color of excel file using Open XML

openxml